chambered russian

• досыла́вший

  having sent (to completion), having forwarded, having chambered (a cartridge)

• досыла́емый

  being sent additionally, being forwarded, being rammed home, being chambered (e.g., a cartridge)

• передёрнувший

  having reloaded (a weapon), having chambered (a round)

  having twitched, having grimaced, contorted (with pain)